OnTimeStats

Historical on-time performance

Chicago to Colorado Springs

911 miData through May 2026Source: US DOT · BTS

Flights on ORD–COS arrive on time 68% of the time over the last 12 months.

On-time rate68%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights

based on 971 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • United Airlines
    On-time86%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights153
  • SkyWest Airlines
    On-time65%
    Medianon time
    p9075 min
    Cancel2.0%
    Flights818

Why flights run late

Delay causes

  • Airline38%
  • Weather15%
  • Air traffic (NAS)19%
  • Late aircraft28%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather100%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 16 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly ORD → COS

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 76% on time.

  • Mornings76% on time · p90 40 min · 1,325 flights
  • Middays63% on time · p90 135 min · 120 flights · limited
  • Evenings60% on time · p90 75 min · 730 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 62% to 74% on time.

  • Tuesdays74% on time · p90 60 min · 316 flights
  • Wednesdays74% on time · p90 50 min · 316 flights
  • Saturdays72% on time · p90 45 min · 323 flights
  • Mondays70% on time · p90 55 min · 320 flights
  • Sundays69% on time · p90 70 min · 323 flights
  • Thursdays69% on time · p90 55 min · 317 flights
  • Fridays62% on time · p90 70 min · 322 flights

Keep exploring

Related pages

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.